The Oscar-winning actress plays a killer whale trainer who loses both of her limbs in an accident in French film 'Rust and Bone', and revealed it was a challenge to make her convincingly look like an amputee.

She explained to ComingSoon.net: ''When we started shooting, I think it was one of the first scenes with the CGI... she walks with the prosthetics and she shows her prosthetics underneath her pants, that was the first thing they did and it was actually pretty amazing.''

The 37-year-old beauty - who is being tipped for an Oscar nomination for the role - went on to heap praise on the film's visual effects team.

She added: ''We really worked with amazing CGI people. They were very discreet on set. They were very fast and actually the fact I had legs never got in our way.''

The 'Dark Knight Rises' star also had to learn to swim without using her legs for the part in order for the CGI to be as believable as possible.

She added: ''I learned how to swim better with my whole body and we dropped the legs. There's a lot you can do in CG but not erasing little waves on the water. It would have been too difficult, so I had to swim without my legs.''